#include <stdio.h>

int main(int argc, char *argv[])
{
        int x = 15, y = 5, z;

#if 0
        y = ++x;
        printf("x=%d y=%d\n", x, y);

        y = x++;
        printf("x=%d y=%d\n", x, y);
#endif

        z = ++x + y++;
        printf("x=%d y=%d z=%d\n", x, y, z);

        return 0;
}
